Department of Defense
High Performance Computing Modernization Program

The following guide explains the steps involved in enabling IPv6 on AIX systems for external communications. You must be running AIX5L or higher. For internal node-to-node communications via IPv6, you must be running AIX7.1 or higher.

The basic process is as follows:

1. Run the autoconf6 command. This brings up IPv6 capable interfaces. Do this by executing either:

/usr/sbin/autoconf6 -i interfacename # Bring up a specific interface, such as en0


/usr/sbin/autoconf6 -a # Bring up all IPv6 capable interfaces

2. Start the ndpd-host service. This starts the neighbor discovery protocol daemon. Do this by executing:

startsrc -s ndpd-host

To configure IPv6 at system startup, put the above entries in the /etc/rc.tcpip file as follows:

start /usr/sbin/autoconf6 “” -a

start /usr/sbin/ndpd-host “$src_running”

NOTE: You can replace the -a argument to autoconf6 with “-i interfacename“ if necessary.

This procedure has been tested with AIX5L version 5.1. It should work with later versions as well.


IBM AIX Technical Documentation

The AIX autoconf6 and ndpd-host man pages.